Excuse me, your MCH is lv. 65; You haven't got to the end yet to judge that MCH is not harder than BRD; Third Child is only lv60 BRD too, and I am Lv.36; None of us have enough experience to judge the other class, including me. What we say is what it ~looks~ like; But we all know that we cannot say X is good or bad if we don't go all the way.

You do have the most lvs with both, but still; The community does say that MCH plays harder than BRD due to all managements, one good example of this is that BRD does not have to manage a gauge and their Straight Shot; The equivalent of Straight Shot to MCH is Hot Shot, but on BRD you have a 20% chance to proc a critical on a skill that increases 10% of your crit chance, MCH does not have this "incentive" to apply Hot Shot, so you have to apply it by yourself; BRD's DoTs can be applied pretty much one after the other, so you can't simply forget it, as far as I know, you don't need to know simple math while playing a BRD to make all your skills align and while doing your priority "rotation" you need to keep track of your gauge so you won't shoot away your chance of a decent Wild Fire and so on~
I am only lv36, what do I know, but I am enjoying BRD yes, but even at lv36, I can understand why it is easier to be efficient as a BRD than as a MCH, I do intend to keep leveling it asap to 70 so I can take it to my static raids, because it will benefit everyone in it.
But anyway, MCH priority rotation is not fluid at all, you have to preemptively think about your moves, BRD is just fluid, I might be wrong later on, but so far its what it feels like.